Finding the Fourth Proportional to 1,279,685.10, 1,920,190.05 and 522,081.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279,685.10 : 1,920,190.05 = 522,081.90 : x
2. Step 2: Convert to fraction form
   1,279,685.10/1,920,190.05 = 522,081.90/x
3. Step 3: Cross multiply
   1,279,685.10x = 1,920,190.05 × 522,081.90
4. Step 4: Simplify right side
   1,279,685.10x = 1,002,496,469,665.10
5. Step 5: Solve for x
   x = 1,002,496,469,665.10/1,279,685.10
6. Step 6: Final answer
   x = 783,393.09